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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 97, No. 5, 2002, pp. 675-678
Bioline Code: oc02130
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 97, No. 5, 2002, pp. 675-678

 en Eye Colour as a Genetic Marker for Fertility and Fecundity of Triatoma infestans check for this species in other resources (Klug, 1834) Hemiptera, Reduviidae, Triatominae
Herton Helder Rocha Pires; Daniele Oliveira Abrão; Evandro Marques de Menezes Machado; Christopher John Schofield & Liléia Diotaiuti

Abstract

Eye colour of Triatoma infestans check for this species in other resources is controlled at a single autosomal locus, with black-eye as the dominant gene and red-eye as the recessive. Inheritance of these characters follows a classical Mendelian system, enabling eye colour to be used as a marker for studies of mating frequency. We found no significant differences in oviposition rates and egg hatching rates irrespective of parental phenotypes. Different mating schedules between red-eye and black-eye parents showed that eye colour did not affect mating competence. Females mated with a single male or with different males together or in succession produced similar numbers of fertile eggs, with the eye colour of the offspring reflecting exposure to the different males. We conclude that although a single mating can provide sufficient sperm for the whole reproductive life of the female, multiple matings can result in balanced assortative sperm usage from the spermatheca.

Keywords
Triatominae - Triatoma infestans check for this species in other resources - eye colour - fertility - fecundity

 
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